2017_2018学年八年级数学上册第十四章整式的乘法与因式分解14.1.1同底数幂的乘法同步精练(新版)新人教版.docx

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2017_2018学年八年级数学上册第十四章整式的乘法与因式分解14.1.1同底数幂的乘法同步精练(新版)新人教版.docx_第1页
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1、1141.1 同底数幂的乘法同底数幂相乘,底数_不变_,指数_相加_,用公式表示 aman_ am n_. 易错点睛 已知 am5, an2,求 am n的值【解】10.【点睛】 am n aman am an.知识点 同底数幂的乘法1(2017燕山)下列各项中,两个幂是同底数幂的是( D )A m2与 n2 B( m)5与 m3 C m3与 3m D x2与 x32下列各式计算结果等于 x4的是( B )A x2 x2 B x2x2C x3 x D x4x3 (2014安徽) x2x3( A )A x5 B x6C x8 D x94填空:(1) a2a3 a5 ;(2) a3(_a7_) a

2、10 ;(3)( a)3( a)5_ a8_.5计算:(1)mm3;【解题过程】解: m4(2) 2 3;(12) ( 12)【解题过 程】解:125(3)(x y)5(x y)8;【解题过程】解:( x y)13(4)( x)3( x)4( x)6.【解题过程】2解: x136计算:(1) b3b3_ b6_;(2)( y x)2(x y)3_ _(x y)5_;(3)82a2b _2 a b3 _.7(1)若 a4ax1 a5,则 x_2_;(2)若 am1 a2m1 a6,则 m 2 .(导学号:58024225)8已知 3x4,求 3x1 的值【解题过程】解:12.9已知 x3xm n x9, ym1 y2n2 y9,求 m, n的值【解题过程】解: m4, n2.10(2017泗阳)规定 a b2 a2b.(导学号:58024226)(1)求 23;(2)若 2( x1 )16,求 x的值【解题过程】解:(1)32;(2)222x1 2 4,2 x14, x1.

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